Walker 18957 Exhaust Muffler

Brand	Walker 18957
Universal Or Specific Fit	Specific
Shape	Oval
Grade Type	Regular
Inlet Inside Diameter	2.625
Body Width	9
Inlet Quantity	1
Outlet Inside Diameter	2.625
Outlet Quantity	1
Reversible	No
Tunable	No
Overall Length	28
Body Height	7
Body Length	24
Body Material	Steel
Finish	Aluminized
Inlet 1 Inside Diameter	2.625
Inlet 1 Type	Pipe connection
Inlet Configuration	Offset
Inlet Offset	1.625
Inlet Type	Pipe connection
Muffler Type	Combination
Outlet 1 Inside Diameter	2.625
Outlet 1 Type	Pipe connection
Outlet Configuration	Offset
Outlet Type	Pipe connection
Product line	SoundFX Direct Fit
Fits	Cadillac, Chevrolet, and GMC · 51 vehicles

Direct-fit design. Installs as a specific-fit exhaust muffler with no guesswork.

Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.

Mechanical interior joints. Spun-locked heads add durability and a quality appearance.

Cross-references AP Exhaust 700303 for the same application. See all 1.

$77.63Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Exhaust Muffler options

Walker SoundFX Direct Fit Muffler for GM SUVs

Walker SoundFX Direct Fit muffler Part Number 18957 is a specific-fit exhaust muffler for select Chevrolet, GMC, and Cadillac full-size SUVs from 2000-2006. It uses an oval steel body with an aluminized finish to support longer service life than low-carbon steel, while maintaining a clean OE-style appearance and controlled exhaust tone.

Key Features

Specific-fit exhaust muffler for direct replacement applications
Oval combination muffler design with 2.625-inch inlet and 2.625-inch outlet
Aluminized steel construction for improved corrosion resistance
Mechanical interior joints and spun-locked heads for added durability
Offset inlet and offset outlet configuration
Body dimensions: 24-inch body length, 28-inch overall length, 9-inch body width, 7-inch body height

Fitment and Application

Compatible with select GM SUV exhaust systems, including Fits 2002-2006 Chevrolet Avalanche 1500, N/A; Fits 2000-2006 Chevrolet Suburban 1500, N/A; Fits 2001-2006 Chevrolet Tahoe, N/A; Fits 2001-2006 GMC Yukon, N/A; Fits 2000-2006 GMC Yukon XL 1500, N/A; Fits 2002-2005 Cadillac Escalade, N/A; Fits 2000 Chevrolet Tahoe, N/A; and Fits 2000 GMC Yukon, N/A. This part number 18957 is also cross-referenced to AP Exhaust 700303 for the same application.

What This Muffler Helps Address

Exhaust noise that has become louder due to a worn muffler
Rust-through or corrosion on the original muffler body
Fitment issues when replacing a factory-style direct-fit muffler
Loss of OE-style exhaust tone after muffler damage
Replacement needs on vehicles with a single outlet muffler replacing a dual outlet setup

Installation Notes

Verify inlet and outlet diameter, offset configuration, and overall length before installation. Some applications note that if the exhaust uses a welded assembly, all required parts should be replaced; certain 2000 model-year vehicles may require modifications and/or additional parts. Part Number 18957 is not reversible and is not tunable.

Quality Assurance

Walker SoundFX Direct Fit mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability and consistent fitment. The SoundFX Direct Fit line focuses on OE-style replacement fit and controlled acoustics for select Chevrolet Tahoe, GMC Yukon, and related GM SUV applications.

This part fits 51 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2006	Chevrolet	Avalanche 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	Chevrolet	Tahoe	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	Chevrolet	Tahoe	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Cadillac	Escalade	5.3L	V8	N/A	Except Luxury Package; Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Chevrolet	Avalanche 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Chevrolet	Tahoe	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Chevrolet	Tahoe	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Cadillac	Escalade	5.3L	V8	N/A	Except Luxury Package; Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Chevrolet	Avalanche 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Chevrolet	Tahoe	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Chevrolet	Tahoe	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Cadillac	Escalade	5.3L	V8	N/A	Except Luxury Package; Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Chevrolet	Avalanche 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Chevrolet	Tahoe	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Chevrolet	Tahoe	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Cadillac	Escalade	5.3L	V8	N/A	Except Luxury Package; Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Chevrolet	Avalanche 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Chevrolet	Tahoe	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Chevrolet	Tahoe	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	Chevrolet	Tahoe	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	Chevrolet	Tahoe	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2000	Chevrolet	Suburban 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
2000	Chevrolet	Tahoe	5.3L	V8	N/A	Except Luxury Package; Single Outlet Muffler Replaces Dual Outlet; If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit
2000	Chevrolet	Tahoe	4.8L	V8	N/A	Except Luxury Package; Single Outlet Muffler Replaces Dual Outlet; If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit
2000	GMC	Yukon	4.8L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit
2000	GMC	Yukon	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit
2000	GMC	Yukon XL 1500	5.3L	V8	N/A	Single Outlet Muffler Replaces Dual Outlet; If welded assembly, replace all required parts; SoundFX Direct Fit
No rows match your filter.

Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

AP Exhaust — 700303